What’s Vulnerable › Vulnerabilities
CVE-2026-86823: Newsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-16 · updated 2026-09-17
- Weakness: CWE-601
Description
The Newsletter WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.
Affected products
- satollo Newsletter – Send awesome emails from WordPress: before 9.3.7 — fixed in 9.3.7
How to fix
Upgrade to a fixed version: satollo Newsletter – Send awesome emails from WordPress 9.3.7. Check the vendor advisory for mitigations.
References
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